JP2009263108A - Elevator position detecting device - Google Patents

Abstract

【Task】
In an elevator position detection apparatus, landing errors are continuously detected simply using a detector and a plate to be detected that are installed opposite to each other. In addition, it is possible to easily attach the detector and the plate to be detected without complicated adjustment work and to prevent catching during an earthquake.
[Solution]
A detector having a maximum or minimum output level on the landing level is placed on the car, and a detection plate having a shape that allows the maximum or minimum value to be output by the detector is installed on the platform threshold.
【effect】
When an abnormality occurs at the time of landing, stop processing or notification can be performed. In addition, it is possible to greatly reduce the adjustment work time related to the position detection device with a simple configuration, and it is also possible to prevent confinement due to rope hooking during an earthquake. In addition, by using a plurality of detectors, the reliability of the system against a failure can be improved.
[Selection] Figure 1

Description

  The present invention relates to an elevator position detection device, and more particularly, to an elevator position detection device that detects the position of a car in a hoistway.

  FIG. 7 shows the overall configuration of a conventional elevator. In the conventional elevator, the position of the moving car 1 in the moving direction is indirectly detected by counting the output pulses of the encoder 7 connected to the electric motor 6 that drives the car 1. The indirect position information of the detected car 1 is different from the actual position information due to the stretch or slip of the rope. This difference is a landing error that is a step between the platform and the car. In order to correct this landing error, a detected plate 13 called a shielding plate is installed near the stop position of each floor, and a detector 15 for detecting the detected plate is installed on the car side. When the detector 15 detects the plate 13 to be detected, the accurate distance to the stop floor is added to the stop operation control of the car 1 as a correction amount. However, since position control is not performed using the position information as negative feedback, landing errors may occur due to the elongation or slipping of the rope that may occur after correction. As a technique for measuring the landing error, a technique for measuring a diamond-shaped detection plate, which is a conventional technique in Patent Document 1, with a transformer, Patent Document 2 using a cam mechanism, or a landing error exceeding a predetermined amount. There is Patent Document 3 in which the floor-to-floor operation is performed only when the operation is performed.

JP-A 63-196479 JP-A-8-59105 JP 2004-067252 A

  However, the conventional technique of Patent Document 1 does not assume that a door zone that is a door openable / closable area is detected. Moreover, since it becomes the structure which pinches | interposes a to-be-detected board, there exists a possibility that an apparatus will jump out in a hoistway and a governor rope may be caught at the time of an earthquake. In Patent Document 2, since a contact mechanism such as a cam is used, there is a risk of failure at the time of constant use, so use in an inspection application is assumed. In Patent Document 3, only a binary landing error indicating whether or not to perform floor-to-floor operation is known.

  Further, in the conventional technology, there is no standard for accurate positioning of the location of the shielding plate, and it is necessary to adjust the shielding plate after the provisional installation.

  First, a shielding plate is attached to the approximate landing position, and then the operation of landing the car is performed. At this time, since the floor surface of the platform is shifted from the floor surface of the car, the position of the shielding plate is adjusted and the car is moved again. Then, by repeatedly performing this operation, the position of the shielding plate is adjusted so as to match the correct landing level. Since this adjustment work is necessary on all floors, a very large amount of time is required. In addition, since the shielding plate and the detector are installed so as to be combined, a bracket is required to attach the shielding plate, and there is a problem that the governor rope is caught by the bracket during an earthquake and the passenger is confined in the elevator.

  An object of the present invention is to continuously detect landing errors easily using a detector and a plate to be detected that are installed opposite to each other.

  Another object of the present invention is to enable easy attachment of a detector and a plate to be detected without complicated adjustment work and to prevent catching during an earthquake.

  In the present invention, in order to detect the landing error between the elevator car and the landing with high accuracy and continuously, the shape of the detected plate is changed with respect to the displacement in the moving direction of the detector, and the detected plate A detector with a continuously changing output depending on the shape was provided on the car.

  In the present invention, in order to eliminate the need for adjusting the shielding plate and prevent the rope from being caught, the detected plate and the detector are opposed to each other, and the detected plate is installed near the landing in relation to the absolute position with respect to the floor.

  The effect of the present invention is that the landing error can be continuously measured, so that when an abnormality occurs at the time of landing, it is possible to perform stop processing or notification.

  In addition, it is possible to greatly reduce the adjustment work time related to the position detection device with a simple configuration, and it is also possible to prevent confinement due to rope hooking during an earthquake.

  In addition, by using a plurality of detectors, the reliability of the system against a failure can be improved.

  FIG. 1 shows the overall configuration of an embodiment of the present invention. The car 1 and the counterweight 14 are connected by the main rope 2, and the car 1 moves up and down in the hoistway by the electric motor 6. At this time, the position of the car 1 is indirectly measured by counting the pulses of the encoder 7, but the position information indirectly measured by the slipping or stretching of the main rope 2 is the position of the car in the hoistway. Deviation occurs with respect to the absolute position. In order to compensate for this deviation, the detected plate 13 is detected by the detector 12 when the car performs a landing operation, and position information is output. With respect to the installation position of the plate 13 to be detected, by installing it on the sill 3 of the landing that is at the same level as the floor surface of the building, which is the absolute position of the landing level, unlike the case of FIG. There are advantages of shortening installation work and eliminating adjustment work.

  An example of the present invention will be described below and its operation will be described.

Example 1
FIG. 2 shows a detection plate according to the first embodiment of the present invention. The detected plate 13 is attached to a landing sill 3 as one of objects that can be linked to the absolute position of the floor surface, and the output changes as the moving direction of the car 1 changes due to the shape of the detected plate 13. The detector 12 is attached to the car 1 so as to face the plate 13 to be detected.

  Specific mounting positions of the detector 12 and the detection plate 13 are shown in FIGS. FIG. 8 is a view showing the mounting position of the car 1 and the landing as viewed from the door side, and FIG. 9 is an overhead view of the mounting position as viewed from above the elevator. The detector 12 is installed under the car 1 with its detection surface horizontal in the elevator movement direction, and the detected plate 13 is mounted on the sill of the landing with the flat plate horizontal in the elevator movement direction. At this time, the positional relationship between the detector 12 and the plate to be detected is horizontal. In addition, the detector 12 is located in a range in which the detection plate 13 can be detected, that is, the center line in the elevator movement direction of the detector 12 is located in the projection toward the hoistway of the detection plate 13, or the whole or a part of the detector is located This is opposed to the plate 13 to be detected. For this reason, it is necessary to use the type of detector 12 to be detected using reflection or interference, not the type of detector 12 to be sandwiched and detected.

  Originally, the error due to the installation accuracy of the sill can be minimized by attaching the detector 12 and the detected plate 13 to the center position of the sill 3 of the landing. However, since there is an apron 701 on the car 1 side, the detector 12 and the plate 13 to be detected are attached to the lateral side.

  The shape of the plate 13 to be detected is such that the landing level 101, that is, the landing error is zero. Further, in order to obtain a shape in which the landing error can be measured at the time of landing, a notch that gives an output corresponding to a predetermined distance from the landing level 101 is given. In this embodiment, an isosceles triangular cut is given to the rectangle so that the projected area portion of the detector 12 on the plate 13 to be detected changes with respect to the vertical movement displacement. In this case, the landing level becomes zero at the minimum of the output signal 102S of the detector.

  An eddy current type detector is used as a detector whose output changes in accordance with a change in the shape of the detection object. First, the operation principle of the eddy current detector will be described. FIG. 6 shows the configuration of an eddy current type detector. The eddy current detector detects a metal (in particular, a magnetic metal having a high magnetic permeability such as iron or nickel) using a high-frequency magnetic field. A high frequency current is passed through the coil 501 using the high frequency oscillation circuit 502 to generate a high frequency magnetic field. At this time, if there is a metal in the magnetic field, an induced current flows on the metal surface, and the amplitude and phase of the high-frequency oscillation change due to the inductance change and heat loss of the coil. The output of the output circuit 503 is changed by the change of the oscillation state, and the principle of the eddy current detector is to measure the distance between the metal and the detector. The factors that change the output are mainly the type of metal and the distance from the metal. The fact that the output changes depending on the distance to the metal is synonymous with the fact that the output changes when the volume of the metal contained in the high-frequency magnetic field changes. In other words, the output changes when the area of the metal contained in the high frequency magnetic field changes. The present invention detects the landing error of the car by utilizing the fact that the output fluctuates due to the change in the area of the metal in the high-frequency magnetic field.

  When a capacitance type detector is used, if the detected plate 13 is a conductor, the output of the detector 12 fluctuates because the capacitance changes due to the change in the distance between the detector 12 and the detected plate 13. The fact that the output of the detector 12 changes in response to the change in the area of the detected plate 13 in the electric field formed by the detector 12 and the detected plate 13 is used.

  Next, a specific operation example is shown. When the car stops, it passes through the end of the plate 13 to be detected. Thus, the door zone is first detected. Further, the distance to the stop position is added to the stop operation control as a correction. In the section 103 of the output 102 of the detector 12 that passes thereafter, the car fluctuates in the horizontal direction due to the distortion of the guide rail and the uneven load of the passenger. This is measured in the section 103, measured in the horizontal direction, and used as a correction when measuring the landing error. After that, the stop operation is performed with the landing level 101 as a target, but an landing error occurs due to the influence of the stretch or slip of the rope. This is measured in 104, that is, the section in which the landing error is output linearly.

  Further, by recording the landing error at the time of landing in an hourly recording device (not shown), it is possible to notify when a landing error occurs.

  The other effects at this time are simple because only one detector is used, satisfy the current function, can measure the landing error, and the shape of the plate to be detected can be cut out at low cost. There is something that can be created.

(Example 2)
FIG. 3 shows a plate to be detected which is a second embodiment of the present invention. By making it the shape of the to-be-detected plate 13, the function similar to Example 1 can be utilized, and the same effect can be acquired.

  FIG. 10 shows another example of the shape of the detection plate. The shape of the detection plate so that the output of the detector becomes maximum or minimum at the landing level 101 is given as a cut-out shape with a curved line with the landing line as the axis of symmetry, or asymmetrical or crested like the plate shape of 903. Or the shape of the valley, that is, the width of the plate to be detected decreases along the moving direction of the car, it becomes a minimum at the landing level, the width increases after passing the minimum point, there are various shapes it is obvious.

(Example 3)
FIG. 4 shows a plate to be detected which is a third embodiment of the present invention. The detected plate 13 is horizontally attached to the platform threshold 3 in the elevator moving direction, and the detector 12 whose output changes depending on the distance between the detected plate 13 and the detector 12 is horizontally attached to the elevator car in the elevator moving direction. At this time, the positional relationship between the detector 12 and the detection plate 13 is horizontal. The shape of the plate 13 to be detected is such that the landing level 101, that is, the landing error is zero. This is the point at which the maximum of the detector output signal 102S is zero. Further, an angle is given to the detected plate 13 so that the landing error can be measured at the time of landing, and the output of the detector 12 is changed linearly according to the distance.

  First, when the car stops, it passes through the end of the detected plate 13. Thus, the distance to the stop position is added to the stop operation control as a correction. After that, the stop operation is performed with the landing level 101 as a target, but an landing error occurs due to the influence of the stretch or slip of the rope. This is measured in 104, that is, the section in which the landing error is output linearly.

  In addition, by recording the landing error at the time of landing in an hourly recording device (not shown), it is possible to notify when a landing error occurs.

  In this embodiment, it is only necessary to bend the detected body 13, work such as notch processing is unnecessary, and there is another effect that the detected body can be produced at low cost.

Example 4
FIG. 5 shows a detected plate according to a fourth embodiment of the present invention. The detectors 12 are arranged in an array and are mounted on the car 1 horizontally with respect to the moving direction of the elevator. The plate 13 to be detected is attached horizontally to the platform threshold 3 with respect to the moving direction of the elevator. At this time, the positional relationship between the detector 12 and the detection plate 13 is horizontal.

  In this embodiment, the landing level 101 and the landing error are measured by the combination of the outputs of the detectors 12. Increasing the number of detectors can improve detection accuracy.

  In addition, even if a part of the detector fails, it can be detected, so that there is an effect that the system is not seriously damaged by the failure of the detector.

It is a figure which shows the whole structure of one Embodiment of this invention. It is a figure explaining operation | movement of Example 1 of this invention. It is a figure explaining operation | movement of Example 2 of this invention. It is a figure explaining operation | movement of Example 3 of this invention. It is a figure explaining operation | movement of Example 4 of this invention. It is a figure explaining the structure of an eddy current type detector. It is a figure which shows the whole structure of the conventional elevator. It is a figure which shows the attachment position of the to-be-detected plate and detector by this invention. It is an overhead view which shows the attachment position of the to-be-detected plate and detector by this invention. It is a figure which shows the other example of the shape of the to-be-detected board by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Riding car 2 Main rope 3 Landing threshold 6 Electric motor 7 Encoder 12 Detector 13 Detected plate 101 Landing level 102S Detector output signal 105 Detector output 106 Detector position 601 Shielding plate 602 Bracket 701 Apron 702 Riding Basket threshold

Claims (10)

  Detecting the vertical position of the car by means of a detection board installed in the elevator hoistway that moves between multiple floors in the building and a detector that is installed on the car and detects the detection board oppositely An elevator position detecting device characterized in that the maximum or minimum of the output of the detector whose output changes by detecting the plate to be detected becomes the landing level of the elevator.   In the position detection device and the detector whose output varies depending on the plate shape, the upper and lower ends of the rectangle are used as the detection part of the door zone by giving the cut plate shape a triangular cutout with the center line of the rectangular plate as the axis of symmetry. The elevator position detecting device according to claim 1, wherein a portion of the apex of the triangle is an elevator landing level, and a landing error can be measured at a side portion.   3. The elevator according to claim 2, wherein in the position detection device, a horizontal variation component of the car is compensated by providing a portion on the detection plate that can measure the distance between the detection plate and the detector. Position detection device.   4. The position detecting apparatus for an elevator according to claim 3, wherein an eddy current type detector is used as the detector.   4. The position detecting device for an elevator according to claim 3, wherein a capacitance type detector is used as the detector.   In the position detection device, a detector whose output changes according to the distance between the object to be detected and the detector and a landing error of the platform and the landing threshold of the platform can be measured by the detector. The elevator position detection apparatus according to claim 1, further comprising a detected object whose distance from the detector changes in accordance with a magnitude of a floor error.   The elevator position detection apparatus according to claim 1, wherein a plurality of detectors are provided in the position detection apparatus, and an landing error is measured by a combination of outputs of the detectors.   8. The elevator position detection apparatus according to claim 2, wherein a detected plate is attached to a threshold of a landing.   9. The position detection apparatus according to claim 8, wherein the length of the apron of the car is L, and the detected plate is attached at a position separated from the center of the platform threshold by a distance L / 2 in the direction of the threshold. The elevator position detection apparatus of description.   8. The elevator position detecting device according to claim 2, wherein a device for recording a landing error is provided in the position detecting device.

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